def test_rule_accessor_set(self):
rule = Seq(Equal('xxx'), Equal('Y'))
rule[0] = String()
assert rule[0] == String()
assert rule[1] == Equal('Y')
try:
rule[2] = String()
except IndexError:
pass
else:
raise AssertionError()
length = len(rule)
rule.insert(Equal('aaa'))
assert len(rule) == length + 1
assert rule[len(rule)-1] == Equal('aaa')
length = len(rule)
rule.insert(Equal('bbb'), 0)
assert len(rule) == length + 1
assert rule[0] == Equal('bbb')
rule.insert(String(), len(rule) + 100)
assert rule[len(rule)-1] == String()
